How to get the browser set in test configuration in VSTS?

I have setup and environment to build and automate the UI test cases using selenium. We can change the test configuration to run the test cases using different browser. However I wanted to know , how can we get the configuration values used during the test run? e.g. If i have three configuration say IE, Chrome, Firefox. I want to run the selected automated test cases using the configuration set. I just need the variable name that can be used to get the configuration. E.g. $(test.rundid), is there something as $(test.configuration)?

Thanks, Abhijit